So I just bought a macbook pro 2015 13inch and was wondering is the trackpad supposed to go down at all? I push down at the top center and the trackpad does indeed go down slightly. I thought the whole point of forcetouch was to eliminate that?
Its just a little bit of flex in the trackpad. Its perfectly normal. If you turn off your computer then try to press on the trackpad you wont feel any click but you see some flex. Also one of the main points of the force touch trackpad was to have an even click over the entire surface of the trackpad.
The force touch track pad is pressure sensitive, using springy metal and strain detectors. The springy metal allows the track pad to deform under pressure. If you look closely at the I-shaped part, you can see a set of 3 grooves that cut into the metal. These pieces of metal deform under pressure, which causes the track pad to depress slightly under pressure.